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Putra, Reza
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PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS TEKNOLOGI AUGMENTED REALITY PADA MATA KULIAH STRUKTUR BETON Putra, Reza; Silalahi, Juniman
Jurnal Applied Science in Civil Engineering Vol 5 No 3 (2024): Jurnal Applied Science in Civil Engineering
Publisher : Teknik Sipil Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/asce.v5i3.112383

Abstract

Struktur Beton merupakan salah satu mata kuliah yang memerlukan usaha ekstra. Hal ini disimpulkan berdasarkan hasil observasi dan wawancara yang dilakukan kepada 15 orang mahasiswa S1 PTB FT UNP. Berdasarkan hasil wawancara yang dilakukan pada 25 September 2023, sebagian besar dari mereka mengatakan adanya kendala terkait kelebihan dan kekurangan untuk setiap mahasiswa berdasarkan perbedaan latar belakang pengetahuan. Dari segi kelebihan, sebagian mahasiswa memiliki pengetahuan matematika dan fisika yang lebih kuat serta kemapuan berfikir logis yang baik, namun kekurangannya mereka kurang familiar dengan konsep teknik sipil, serta hal ini berakibat kepada sulitnya mahasiswa memahami konsep abstrak untuk menerapkannya kepada visualisasi gambar dengan tepat. Tujuan utamanya adalah agar materi perkuliahan dapat disampaikan dengan cara yang lebih engas dan sesuai dengan konteks perkembangan terkini dalam bidang ini. Metode penelitian yang digunakan adalah MDLC (Multimedia Development Life Cycle), dengan pengumpulan data melaluiI kuesioner. Data yang diperoleh kemudian dianalisis menggunakan uji validitas, analisis deskriptif. Hasil analisis menunjukan bahwa teknologi Augmented Reality mempengaruhi kemampuan memahami materi struktur beton pada mahasiswa yang mengampu mata kuliah struktur beton.
ANALISA KOMPOSISI KIMIA DAN STRUKTUR MIKRO HASIL PROSES PACK CARBURIZING MENGGUNAKAN ARANG KULIT SINGKONG PADA BAJA AISI 1020 Habibi, Muhammad; Ilhamda, Risky; Muhammad; Putra, Reza
Mechonversio: Mechanical Engineering Journal Vol. 6 No. 2 (2023): DESEMBER 2023
Publisher : Univervitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/mmej.v6i2.16460

Abstract

Penelitian ini bertujuan untuk mengetahui komposisi karbon yang terdifusi sebelum dan setelah dilakukannya pack carburizing dengan arang kulit singkong pada temperatur 875ºC dan 900ºC dengan holding time 120 menit dan mengetahui perubahan struktur mikro pada baja setelah dan sebelum dilakukan pack carburizing. Hasil penelitian ini menunjukkan peningkatan nilai karbon pada baja setelah dilakukkannya pack carburizing, pada raw material hanya mengandung 0,217% dan setelah dilakukan pack carburizing pada temperature 875 ºC karbon meningkat hingga 0,327% dan pada temperature 900ºC komposisi karbon mencapai 0,356%. Pada pengujian struktur mikro sampel raw material struktur mikro yang lebih dominan ialah ferit dan setelah dilakukan proses pack carburizing pada temperature 875ºC terbentuknya struktur perlit dan pada temperatur 900ºC terdapat martensit. Pada perhitungan diameter rata rata partikel didapatkan nilai rata-rata diameter partikel pada raw material 6,420 ?m dengan jumlah keseluruhan 139 partikel, material hasil pack carburizing temperature 875ºC nilai rata-rata diameter partikel 7,694?m dengan jumlah keseluruhan 177 partikel dan pada temperatur 900ºC nilai rata-rata diameter partikel 7,356 ?m dengan jumlah keseluruhan 83 partikel.
Pengaruh Surface Roughnes Pada Material AISI 1045 dan AISI 4140 Akibat Proses Pemesinan Bubut Azhari, Wafiq; Aljufri, Aljufri; Rahman, Abdul; Putra, Reza; Akmal, Syarifah
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 1 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i1.12448

Abstract

Lathe machining is one type of conventional machine tool used for cutting/filling workpieces which is done by making an incision on the workpiece where the tool is moved translationally and parallel to the axis of the rotating workpiece. The result of the components of the turning process that is commonly done is surface roughness which is influenced by tool cutting angle, feeding speed, cutting speed, depth of cut. This study was conducted to determine how much influence the speed of feeding and depth of feeding on AISI 1045 steel and AISI 4140 steel materials used in shafts, conecting roads, gears with carbide chisels. With Vc=140 m/min, Vc=150 m/min, Vc=170 m/min, and Vc=180 m/min, and knowing the surface roughness of the workpiece using a carbide tool.  From the results of research on AISI 1045 and AISI 4140 steel for cutting along 50 mm with engine speed 1200 rpm and cutting depth 0.3 mm, as well as the cutting speed used Vc=140 m/min, Vc=150 m/min, Vc=170 m/min and Vc=180 m/min and the initial cutting distance of 4 mm, the time needed is 1,125 minutes. For the surface roughness value of AISI 1045 steel material and AISI 4140 steel has four variations in lathe feeding speed in this study, which in each variation has a different surface roughness value, the smallest surface roughness value is AISI 4140 steel with a feeding speed vc = 180 m / min surface roughness value of 0.705 μm compared to AISI 1045 steel material. This is due to the greater the movement of the feeding speed of feeding, the smaller the value of the surface roughness of the material
ANALISA PENGARUH HOLDING TIME DAN TEMPERATUR PADA PACK CARBURIZING MENGGUNAKAN LIMBAH KULIT SINGKONG TERHADAP SIFAT FISIK DAN MEKANIK BAJA 1020 Fikri, Ali; Muhammad, Muhammad; Rahman, Abdul; Putra, Reza; Habibi, Muhammad
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 2 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i2.13647

Abstract

The purpose of this study to determine the effect holding time on increasing the surface hardness of AISI 1020 steel material and analyzing the physical and mechanical properties of the results pack carburizing cassava peel waste on AISI 1020 steel. Process pack carburizing in this study have variations temperature 875oC and 900oC withholding time 60 minutes, 80 minutes, 100 minutes and 120 minutes. The catalyst used in this study was a carbonate compound, namely 20% BaCo3 to accelerate the reaction of adding carbon. The research results show that pack carburizing from cassava peel waste carbon can increase the surface hardness of AISI 1020 steel or part of the mechanical properties of the material. Testing at a temperature of 875oC withholding time 60 minutes which is 10.7 HRC and is the lowest value in the study while the highest hardness value occurs at a temperature of 900OC withholding time 120 minutes is 48.2 HRC. Microstructure observation results (metallography) on the edges indicates the martensite phase. The more martensite phase, the higher the value of the surface hardness of the steel material in the same direction as the effect of the length of holding time(holding time)
PELAKSANAAN KESELAMATAN DAN KESEHATAN KERJA PADA PROYEK GEDUNG RUSUNAWA YAYASAN ALMUSLIM KABUPATEN BIREUEN Sakura, Royanna; Putra, Reza; Masrura, Delfian; Sazali, Munawir
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 2 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i2.14629

Abstract

Employment agency such as construction companies must maintain and provide the health of employees, this health comprehensively includes the physical and mental health of workers. Poor worker health can have unfavorable effects for both the worker and the company. Occupational health programs can be carried out by creating a healthy work environment. In the implementation, the occupational health program is always followed by an occupational safety program because the two programs are interrelated in the maintenance of workers. Occupational safety is safety related to the use of the latest technology such as machines, work equipments, materials and processing, the foundation of the place and the environment and steps of the work. Occupational safety and health can help make workers feel comfortable, safe and secure in carrying out the obligations to the company. The purpose of this research was to determine the application of Occupational Safety and Health (OSH) and the comfort level of workers at PT. Wandra Cipta Engineering Consultant in the tenement (Rusunawa) building project of the Almuslim foundation, Bireuen Regency. The research method used in this research was a quantitative method including surveys, questionnaires and interviews while data processing was done by using SPSS software version 25. The results of the research indicated that Occupational Safety and Health (OSH) and the comfort level of workers at PT. Wandra Cipta Engineering Consultant in the tenement (Rusunawa) building project of the Almuslim foundation, Bireuen Regency was very comfortable. This can be seen from the results of data processing on occupational safety and health, it was found that 58.57% of the respondents agreed and the reliability test was 0.724 and 0.843. respectively
Rancang Bangun Alat Pengiris Bawang Serbaguna Zulkarnaen, Amay Velda; Dabet, Abubakar; Yusuf, Muhammad; Putra, Reza; Jumadi, J
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 1 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i1.12591

Abstract

This study aims to obtain the production amount of the slicing process of a multipurpose onion slicer according to the needs of the home industry. This versatile onion slicer uses two ways, namely conventional and unconventional. From the experimental results, the rotation of the cutting disk obtained a speed of 46.05 m / s, the cutting power obtained based on the calculation of 513.9 Watt, smaller than the motor power used. The average working capacity of slicing using an electric motor within 1 hour for shallots, plantains, and cassava is 213 g/min, 590.33 g/min and 474.66 g/min, respectively. While if using the manual method is 125.66 g/min, 128.66 g/min, and 161 g/min. Using a 220 Volt water pump drive engine 0.5 HP 2000 Rpm, which is added to the dimmer to adjust the rotation speed. The frame uses Aluminum with a thickness of 1.2 mm.
Pengaruh Orientasi Arah Serat Terhadap Ketangguhan Impact Komposit Serat Daun Lidah Mertua dengan Metode Hand Lay-Up Azhari, Nur Jannah; Putra, Reza; Muhammad, M; Rahman, Abdul; Zulmiardi, Z
Malikussaleh Journal of Mechanical Science and Technology Vol 8, No 1 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i1.16462

Abstract

Perkembangan ilmu dalam bidang material mengalami kemajuan yang sangat pesat, manusia telah melakukan beberapa inovasi dalam penggunaan teknik material komposit serat alam untuk mendapatkan material yang memiliki kualitas lebih baik, Komposit serat alam merupakan perkembangan ilmu material yang saat ini mulai banyak dikembangkan karena memiliki sifat yang kuat, ringan, murah dan ramah lingkungan. Adapun jenis serat yang digunakan adalah serat daun lidah mertua (sanseviera trifasciata) yang digunakan sebagai penguat dan jenis resin yang digunakan adalah Resin Polyester Yucalac 157 BQTN. Kekuatan komposit serat alam dapat dipengaruhi oleh orientasi arah serat. Pada penelitian ini menggunakan orientasi arah serat 0°, 45°, 90°. Tujuan dari penelitian ini adalah untuk mengetahui seberapa besar pengaruh orientasi arah serat terhadap ketangguhan impact  dari material serat alam. Pembuatan komposit menggunakan metode hand lay up. Dari hasil pengujian impact yang dilakukan, penguat serat dengan orientasi 45° memiliki nilai kekuatan yang lebih tinggi dibandingkan dengan orientasi arah serat 0°, dan 90°. Terdapat nilai ketangguhan impact terbesar pada orientasi arah serat 45° berpenguat serat daun lidah mertua sebesar 0,187049  joule/mm2, orientasi arah serat 0° sebesar 0,17756 joule/mm2, dan nilai ketangguhan impact terendah pada orientasi arah serat 90° sebesar 0,075035  joule/mm2.
Pengaruh Fraksi Volume Serat Terhadap Kekuatan Tarik Komposit Serat Daun Nanas dan Sabut Kelapa dengan Polyester Bening 108 Muhammad, M; Putra, Reza; Hafli, T; Islami, Nurul; Malik, Abdul
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 1 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i1.12490

Abstract

The goal of this study is to determine the effect of the matrix-to-filler ratio on the characteristic value of composites made from pineapple leaf fiber and coco fiber using clear polyester resin 108 as a matrix. The composite printing process involves combining 70% resin and 5% pineapple fiber: 15% pineapple fiber, 25% coconut fiber: 15% coconut fiber, 25% pineapple fiber, and 5% coconut fiber with 1% catalyst. The Hand-Lay Up method is used to create composites. Tensile strength testing mechanical properties are based on standards (ASTM D-3039). The tensile strength of 25% pineapple leaf fiber is the highest in this percentage variation: 5% coconut fiber with an average value of 44.88 MPa, 3.37% tensile strain, while pineapple leaf fiber 5% has the lowest tensile strength value: 25% coconut fiber with a 25.26 MPa average and a 2.54% tensile strain. According to the findings, the composite of 25% pineapple leaf fiber: 5% coconut fiber immersed in NaOH is suitable for use as an alternative tensile material.
Pengaruh Fraksi Volume Serat Terhadap Peningkatan Kekuatan Impak dan Kekuatan Tarik Komposit Berpenguat Serat Daun Nanas (Ananas Cosmosus) Zahrani, Amilia; Sayuti, Muhammad; Zulnazri, Zulnazri; Putra, Reza; Islami, Nurul
Malikussaleh Journal of Mechanical Science and Technology Vol 8, No 1 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i1.14659

Abstract

A composite is a technical material that is made by combining two or more materials that have different properties to become a new material with different properties. Natural fibers used as composite reinforcement are more environmentally friendly and biodegradable. The use of natural fibers as composite reinforcement in recent years has experienced very rapid development. One of them is pineapple leaf fiber. The aim of this research is to determine the effect of fiber volume fraction and NaOH immersion on the mechanical properties (Tensile Strength and Impact Strength) of composites reinforced with pineapple leaf fibers with an epoxy matrix. In this research, woven composites were made with variations in volume fraction and NaOH immersion time for the fibers, then tensile tests according to ASTM D-3039 standards and impact tests according to ASTM D256 standards. Based on test results with varying fiber volume fractions of 15%, 20%, and 25%, the strength results increase and decrease. The tensile strength of the composite tends to increase with increasing fiber volume fraction and NaOH immersion. However, the longer the soaking time, namely 4 hours, the tensile strength of the composite tends to decrease. The most optimal average value of tensile strength is at a fiber volume fraction of 25% with fiber soaking for 2 hours with a value of 23.07 MPa and the lowest average value of tensile strength is at a fiber volume fraction of 15% with fiber soaking for 4 hours with value 11.31 MPa. Meanwhile, the highest average impact value was owned by a composite with a fiber volume fraction of 20% without soaking, namely 0.0589 j/mm2 and the lowest impact value was with a fiber volume fraction of 20% with fiber soaking for 4 hours, namely 0.0124 j/mm2.
Design of A Portable Solid-Fuel Rocket Stove Aljufri, Aljufri; Putra, Reza; Rahman, Abdul; Mardian, Rikki
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.153-160

Abstract

The depletion of fossil fuels is a hot topic of discussion these days. This is due to the increasing use of fossil fuels in human life. In terms of the increase in fuel and gas prices, we realise that the energy consumption that is increasing from year to year is not balanced with the availability of energy sources, which affects households that use fuel in the cooking process. So a design was carried out to make an ergonomic solid fuel stove with the aim of not using fuel anymore in the cooking process, in this design, the stove is designed to be more flexible and get a portable biomass rocket stove design by considering social aspects, performance, local resources, economy, environmentally friendly. Biomass fuels are solids, liquids or gases produced from organic matter.. Biomass fuels used in solid fuel stoves such as firewood, charcoal, briquettes and pellets. Each biomass fuel has different properties and characteristics. The designed portable rocket stove consists of several main parts namely combustion chamber, chimney, air duct, pan spot and cassing, using stainless steel material. The test results include combustion chamber and water temperature during the process, thermal efficiency, combustion rate and specific fuel consumption under cold start and hot start conditions. After hot start, it is found that the use of a chimney on a portable stove designed using coconut shell fuel is more effective than without a chimney. Shorter boiling time of 1 minute, greater combustion rate of 0.13 grams/minute, higher thermal efficiency of 2% and lower specific fuel consumption of 9.11 grams/litre of water when the stove uses a chimney.
Co-Authors Abdul Rahman Abdul Rahman Adi Setiawan Akmal, Syarifah Alchalil Alchalil Aljufri Aljufri Apandi S, Arpan Asnawi Asnawi Asnawi Azhari, Nur Jannah Azhari, Wafiq Dabet, Abubakar Delfian Masrura Faisal Faisal Ferri Safriwardy Hafli, T Hidayat, Rizki Ikramullah, Firza Ilhamda, Risky Jumadi, J M Sayuti M. Ali Fikri Mardian, Rikki Masrullita, Masrullita Muhammad Muhammad Habibi Muhammad Muhammad Muhammad Muhammad Muhammad Muhammad Muhammad Nuzan Rizki Muhammad Yusuf Muhammad, M Munawir Sazali Nurul Islami, Nurul Radian, Hagi Riskan, Ardi Riza Wirawan, Riza Sakura, Royanna Sayuti, Muhammad Silalahi, M.Pd, Drs. Juniman Simanjuntak, Ochitria Cintia Br Suryadi Suryadi Tri Waluyo Utaminingrum, Fitri Zahrani, Amilia Zulkarnaen, Amay Velda Zulmiardi, Z Zulnazri, Z